That's really awful. They can make tiny prosthetic ear bones now, and even shape those that have bone spurs or incorrect shapes. But complete encasing? That would be a problem. This mechanism unfortunately doesn't really help the situation of those like you yet. The best bet would be bypassing the "external" mechanics and going with something like a cochlear implant.

Hearing research is way behind other health fields, makes me very sad since it affects so many people.